package com.lewis.generator.utils;

import com.alibaba.fastjson.JSONObject;
import com.lewis.core.constant.GenConstants;
import com.lewis.core.utils.DateUtil;
import com.lewis.core.utils.StringUtil;
import com.lewis.generator.entity.GenTable;
import com.lewis.generator.entity.GenTableColumn;
import org.apache.velocity.VelocityContext;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

/**
 * 模板处理工具类
 *
 * @author Lewis
 */
public class VelocityUtils {

	/**
	 * 项目空间路径
	 */
	private static final String PROJECT_PATH = "main/java";

	/**
	 * mybatis空间路径
	 */
	private static final String MYBATIS_PATH = "main/resources/mapper";

	/**
	 * 默认上级菜单，系统工具
	 */
	private static final String DEFAULT_PARENT_MENU_ID = "3";

	/**
	 * 设置模板变量信息
	 *
	 * @return 模板列表
	 */
	public static VelocityContext prepareContext(GenTable genTable) {
		String moduleName = genTable.getModuleName();
		String businessName = genTable.getBusinessName();
		String packageName = genTable.getPackageName();
		String tplCategory = genTable.getTplCategory();
		String functionName = genTable.getFunctionName();

		VelocityContext velocityContext = new VelocityContext();
		velocityContext.put("tplCategory" , genTable.getTplCategory());
		velocityContext.put("tableName" , genTable.getTableName());
		velocityContext.put("functionName" , StringUtil.isNotEmpty(functionName) ? functionName : "【请填写功能名称】");
		velocityContext.put("ClassName" , genTable.getClassName());
		velocityContext.put("className" , StringUtil.uncapitalize(genTable.getClassName()));
		velocityContext.put("moduleName" , genTable.getModuleName());
		velocityContext.put("BusinessName" , StringUtil.capitalize(genTable.getBusinessName()));
		velocityContext.put("businessName" , genTable.getBusinessName());
		velocityContext.put("basePackage" , getPackagePrefix(packageName));
		velocityContext.put("packageName" , packageName);
		velocityContext.put("author" , genTable.getFunctionAuthor());
		velocityContext.put("datetime" , DateUtil.getDate());
		velocityContext.put("pkColumn" , genTable.getPkColumn());
		velocityContext.put("importList" , getImportList(genTable));
		velocityContext.put("permissionPrefix" , getPermissionPrefix(moduleName, businessName));
		velocityContext.put("columns" , genTable.getColumns());
		velocityContext.put("table" , genTable);
		setMenuVelocityContext(velocityContext, genTable);
		if (GenConstants.TPL_TREE.equals(tplCategory)) {
			setTreeVelocityContext(velocityContext, genTable);
		}
		if (GenConstants.TPL_SUB.equals(tplCategory)) {
			setSubVelocityContext(velocityContext, genTable);
		}
		return velocityContext;
	}

	public static void setMenuVelocityContext(VelocityContext context, GenTable genTable) {
		String options = genTable.getOptions();
		JSONObject paramsObj = JSONObject.parseObject(options);
		String parentid = getParentid(paramsObj);
		context.put("parentid" , parentid);
	}

	public static void setTreeVelocityContext(VelocityContext context, GenTable genTable) {
		String options = genTable.getOptions();
		JSONObject paramsObj = JSONObject.parseObject(options);
		String treeCode = getTreecode(paramsObj);
		String treeParentCode = getTreeParentCode(paramsObj);
		String treeName = getTreeName(paramsObj);

		context.put("treeCode" , treeCode);
		context.put("treeParentCode" , treeParentCode);
		context.put("treeName" , treeName);
		context.put("expandColumn" , getExpandColumn(genTable));
		if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) {
			context.put("tree_parent_code" , paramsObj.getString(GenConstants.TREE_PARENT_CODE));
		}
		if (paramsObj.containsKey(GenConstants.TREE_NAME)) {
			context.put("tree_name" , paramsObj.getString(GenConstants.TREE_NAME));
		}
	}

	public static void setSubVelocityContext(VelocityContext context, GenTable genTable) {
		GenTable subTable = genTable.getSubTable();
		String subTableName = genTable.getSubTableName();
		String subTableFkName = genTable.getSubTableFkName();
		String subClassName = genTable.getSubTable().getClassName();
		String subTableFkClassName = StringUtil.convertToCamelCase(subTableFkName);

		context.put("subTable" , subTable);
		context.put("subTableName" , subTableName);
		context.put("subTableFkName" , subTableFkName);
		context.put("subTableFkClassName" , subTableFkClassName);
		context.put("subTableFkclassName" , StringUtil.uncapitalize(subTableFkClassName));
		context.put("subClassName" , subClassName);
		context.put("subclassName" , StringUtil.uncapitalize(subClassName));
		context.put("subImportList" , getImportList(genTable.getSubTable()));
	}

	/**
	 * 获取模板信息
	 *
	 * @return 模板列表
	 */
	public static List<String> getTemplateList(String tplCategory) {
		List<String> templates = new ArrayList<String>();
		templates.add("vm/java/entity.java.vm");
		templates.add("vm/java/mapper.java.vm");
		templates.add("vm/java/service.java.vm");
		templates.add("vm/java/serviceImpl.java.vm");
		templates.add("vm/java/controller.java.vm");
		templates.add("vm/xml/mapper.xml.vm");
		templates.add("vm/sql/sql.vm");
		templates.add("vm/js/api.js.vm");
		if (GenConstants.TPL_CRUD.equals(tplCategory)) {
			templates.add("vm/vue/index.vue.vm");
		} else if (GenConstants.TPL_TREE.equals(tplCategory)) {
			templates.add("vm/vue/index-tree.vue.vm");
		} else if (GenConstants.TPL_SUB.equals(tplCategory)) {
			templates.add("vm/vue/index.vue.vm");
			templates.add("vm/java/sub-entity.java.vm");
		}
		return templates;
	}

	/**
	 * 获取文件名
	 */
	public static String getFileName(String template, GenTable genTable) {
		// 文件名称
		String fileName = "";
		// 包路径
		String packageName = genTable.getPackageName();
		// 模块名
		String moduleName = genTable.getModuleName();
		// 大写类名
		String className = genTable.getClassName();
		// 业务名称
		String businessName = genTable.getBusinessName();

		String javaPath = PROJECT_PATH + "/" + StringUtil.replace(packageName, "." , "/");
		String mybatisPath = MYBATIS_PATH + "/" + moduleName;
		String vuePath = "vue";

		if (template.contains("entity.java.vm")) {
			fileName = StringUtil.format("{}/entity/{}.java" , javaPath, className);
		}
		if (template.contains("sub-entity.java.vm") && StringUtil.equals(GenConstants.TPL_SUB, genTable.getTplCategory())) {
			fileName = StringUtil.format("{}/entity/{}.java" , javaPath, genTable.getSubTable().getClassName());
		} else if (template.contains("mapper.java.vm")) {
			fileName = StringUtil.format("{}/mapper/{}Mapper.java" , javaPath, className);
		} else if (template.contains("service.java.vm")) {
			fileName = StringUtil.format("{}/service/I{}Service.java" , javaPath, className);
		} else if (template.contains("serviceImpl.java.vm")) {
			fileName = StringUtil.format("{}/service/impl/{}ServiceImpl.java" , javaPath, className);
		} else if (template.contains("controller.java.vm")) {
			fileName = StringUtil.format("{}/controller/{}Controller.java" , javaPath, className);
		} else if (template.contains("mapper.xml.vm")) {
			fileName = StringUtil.format("{}/{}Mapper.xml" , mybatisPath, className);
		} else if (template.contains("sql.vm")) {
			fileName = businessName + "Menu.sql";
		} else if (template.contains("api.js.vm")) {
			fileName = StringUtil.format("{}/api/{}/{}.js" , vuePath, moduleName, businessName);
		} else if (template.contains("index.vue.vm")) {
			fileName = StringUtil.format("{}/views/{}/{}/index.vue" , vuePath, moduleName, businessName);
		} else if (template.contains("index-tree.vue.vm")) {
			fileName = StringUtil.format("{}/views/{}/{}/index.vue" , vuePath, moduleName, businessName);
		}
		return fileName;
	}

	/**
	 * 获取包前缀
	 *
	 * @param packageName 包名称
	 * @return 包前缀名称
	 */
	public static String getPackagePrefix(String packageName) {
		int lastIndex = packageName.lastIndexOf(".");
		String basePackage = StringUtil.substring(packageName, 0, lastIndex);
		return basePackage;
	}

	/**
	 * 根据列类型获取导入包
	 *
	 * @param genTable 业务表对象
	 * @return 返回需要导入的包列表
	 */
	public static HashSet<String> getImportList(GenTable genTable) {
		List<GenTableColumn> columns = genTable.getColumns();
		GenTable subGenTable = genTable.getSubTable();
		HashSet<String> importList = new HashSet<String>();
		if (StringUtil.isNotNull(subGenTable)) {
			importList.add("java.util.List");
		}
		for (GenTableColumn column : columns) {
			if (!column.isSuperColumn() && GenConstants.TYPE_DATE.equals(column.getJavaType())) {
				importList.add("java.util.Date");
				importList.add("com.fasterxml.jackson.annotation.JsonFormat");
			} else if (!column.isSuperColumn() && GenConstants.TYPE_BIGDECIMAL.equals(column.getJavaType())) {
				importList.add("java.math.BigDecimal");
			}
		}
		return importList;
	}

	/**
	 * 获取权限前缀
	 *
	 * @param moduleName   模块名称
	 * @param businessName 业务名称
	 * @return 返回权限前缀
	 */
	public static String getPermissionPrefix(String moduleName, String businessName) {
		return StringUtil.format("{}:{}" , moduleName, businessName);
	}

	/**
	 * 获取上级菜单ID字段
	 *
	 * @param paramsObj 生成其他选项
	 * @return 上级菜单ID字段
	 */
	public static String getParentid(JSONObject paramsObj) {
		if (StringUtil.isNotEmpty(paramsObj) && paramsObj.containsKey(GenConstants.PARENT_MENU_ID)
				&& StringUtil.isNotEmpty(paramsObj.getString(GenConstants.PARENT_MENU_ID))) {
			return paramsObj.getString(GenConstants.PARENT_MENU_ID);
		}
		return DEFAULT_PARENT_MENU_ID;
	}

	/**
	 * 获取树编码
	 *
	 * @param paramsObj 生成其他选项
	 * @return 树编码
	 */
	public static String getTreecode(JSONObject paramsObj) {
		if (paramsObj.containsKey(GenConstants.TREE_CODE)) {
			return StringUtil.toCamelCase(paramsObj.getString(GenConstants.TREE_CODE));
		}
		return StringUtil.EMPTY;
	}

	/**
	 * 获取树父编码
	 *
	 * @param paramsObj 生成其他选项
	 * @return 树父编码
	 */
	public static String getTreeParentCode(JSONObject paramsObj) {
		if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) {
			return StringUtil.toCamelCase(paramsObj.getString(GenConstants.TREE_PARENT_CODE));
		}
		return StringUtil.EMPTY;
	}

	/**
	 * 获取树名称
	 *
	 * @param paramsObj 生成其他选项
	 * @return 树名称
	 */
	public static String getTreeName(JSONObject paramsObj) {
		if (paramsObj.containsKey(GenConstants.TREE_NAME)) {
			return StringUtil.toCamelCase(paramsObj.getString(GenConstants.TREE_NAME));
		}
		return StringUtil.EMPTY;
	}

	/**
	 * 获取需要在哪一列上面显示展开按钮
	 *
	 * @param genTable 业务表对象
	 * @return 展开按钮列序号
	 */
	public static int getExpandColumn(GenTable genTable) {
		String options = genTable.getOptions();
		JSONObject paramsObj = JSONObject.parseObject(options);
		String treeName = paramsObj.getString(GenConstants.TREE_NAME);
		int num = 0;
		for (GenTableColumn column : genTable.getColumns()) {
			if (column.isList()) {
				num++;
				String columnName = column.getColumnName();
				if (columnName.equals(treeName)) {
					break;
				}
			}
		}
		return num;
	}
}
